Convalescence was a period of time in which an ill or injured individual recuperated.
In 2267, after being woken up following the discovery of the SS Botany Bay, Khan Noonien Singh asked James T. Kirk for reading material to pass the time during his convalescence, suggesting USS Enterprise's technical manuals. (TOS: "Space Seed")
In 2372, after suffering from hyperthermic induction, Tuvok brushed off The Doctor's suggestion that he go on light duty for the next three days and rest, as his Vulcan healing techniques did not require he convalesce for a long time. (VOY: "Cold Fire")